Sheet-manipulating mechanism.



A. R. PRIBIL.

SHEET MANIPULATING MECHANISM.

. APPLICATION rum) 001212, 1908.

968,978. PatenteglAugfiO, 1910.

all I 35 O 1 I I q/vflmaoaeo avwemfoz M W was main. mum mum-mun L .To'alZ my mum:

tion.

I UNITED str TEs PATENT OFFICE.

ngr'nmrn, or person, MICHIGAN, assrenon T AUTOMATIC PLATEN rnnss comm, or new YORK, N. Y., A oonrormrion on new JERSEY.

-SHE-ET-MANIPULATING MECHANISM.

'7 Application fi1edoctober'12'f1908. Serial No. 457,209.

it known that I, ALnxIs RQPnIBIL, a citizen of the United States'of America and a'resident of Detroit,- Wayne county,'-M1ch1- "gan, have invented certain new and useful Improvements in Sheet-Manipulating Mechanisms, of whichthe following is aspecification'relates to improvements in sheet 'manip ulating mechanisms and particularly refers to; novel means for feeding and delivering-sheets'to the platen of a press of This inve I the type known as a job press, although it willappear and must be understood that my inventionjmay be useful on othertypes of printing:machines.

. One-object of my invention is to provide afeed gripper by means of which the paper may-be fed' to any desired position-on the platen, so that by' simply adjusting the stroke or motion of the feedgrippers, the feed is .accommodated to the jobto' be printed.

Another object is to so locate the gripping mechanisms that they take up but little room In the accompanying drawing I have shown my invention in somewhat diagrammatie form and asemployed on a job press havinglajstationary platen, but this type of printing machine is to be taken asjan illustration only for the purpose of this disclosure. I

' In the said drawings Figure 1 is a side elevation of a job press equipped with a sheet feedingand delivery mechanism em-, bodying my invention at the moment of im-v ression and with artsomitted and Fig. 2 1s a' detail view- 0 parts 'of the adjusting means -for thefeed grippers.

. In the drawing the numeral 1 indicates the frame of a job press, which supports the platen 2, inthis instance stationary, and the stock 3 to be-printedp 1" denotes a suitable receptacle for said stock, which latter may be fed forward by a follower 5 while 6 denotes diagrammatically 'a mechanism for separating or-crowding the first sheet 013? the pile and into the bite of the grippers. The

arrangement for supporting and handling thesheet'sby the members just referred to is shown here forthe sake ofcompletenessonly and'has otherwise no bearing on this invention.

The feeding grippers are denoted by the located for adjustments j numeral and may be of any suitable con-' struction' and operated by any. well known means in the art. The grippers are operated by means'of arms 8 one on each side of the ed in and operated by arms 10, one on each" sp cification of Letters Patent. Pat,1 1ted Aug, 30,- 1910.

side of, the machine and pivoted on .a

shaftll. V r

In. the drawing the feed grippers are shown in full lines in their lowermost position when handling the largest size of sheet to be printed on this press, and in dotted line they are shown also in their uppermost position at the moment of tak ng a sheet from the pile irrespective of the size of said sheet. .As stated above these feed grippers may be operated to feed a sheet to any position on: the platen Within predetermined limits. And in dotted linesat 12 the feed grippers are shown in their lowermost position when feeding a sheet of the smallest size to be-printed by this press. "In order to accomplish this object it is only necessary to change the location of the shaft 13 and to make such .minor, change. in the operating mechanism as is needed to obtain the exact stroke of the feed grippers. The shaft 13 is oscillated by means of the gear 14 mesh- .ing with the rack 15 which latter operates in a pivoted guide 16 by, means of the bell crank 17 pivoted at 18.. The one arm of the bell crank carries a cam roll 19 coacting with.

the cam 20 on shaft 21 towhich power is applied in any convenient form.; '1 he shaft 11 for the dehverygrippers is alsooscillated by means of a gear'and rack 22 and .23 respectively; The rack 23 operates in av pivoted ide 2 Land its lower end is pivoted to a ever 25 which in turn is pivoted at 26 and carries a cam roll 27 also coacting with the said cam 20. From this it will be seen, that as the shaft rotates the arms 8 and 10 operate the feed and delivery grippers respectively-and in time as shown in the drawing, plained.

In order to change the stroke of the .feed grippers the following means are employed, and as they are alikeion both sides of the machine the description of the means on the one side will be sufiicient. The shaft 13 is carried in boxes29 which slide in ways '30, and maybe fastened in' any position in and as will be presently exsaid ways by bolts 31 and clamping nuts 35 provided with hand wheels 32. The gear 14 is fastened on the one end of said shaft and the arms 8 are provided with slots 33 and clamped to the shaft 13 by nut 34; or

other suitable means. Now, when the stroke of the grippers 7 is to be changed, the nuts 34 are loosened, the clamps 35 are loosened and the boxes 29 are moved to the desired position in the ways 30 and clamped there. Next the grippers 7 are adjusted in the desired position on the platen and then clamped to the shaft 13, and the arms 8 then assume a corresponding position as shown at 12 in dotted lines. It will be evident that as the shaft 13 is moved the rack 15 also must change its position and this new position is also indicated in dotted lines at 86.

From an examination of the drawing it will be clear that the angles between the uppermost position of the feed grippers and the several lowermost positions thereof vary but slightly due to the direction of the ways 30, hence the stroke of the rack 15 needs but little adjustment, and this latter is obtained by adjusting the internally threaded sleeve 37 on the bell crank 17 As will be seen the one arm of the bell crank ends in a right hand threaded shaft 38, while the, rack 15 is pivoted to a left hand threaded shaft 39 and the length of the thus combined shafts 38 and 39 is adjusted by turning the sleeve 37, hence the stroke of the rack 15 is adjusted. to suit the location of shaft 13. In practice the'stroke of the arms 8 vary but a few degrees so this adjustment is easily accomplished.

The operation of the grippers will beclear from the drawing and is as follows. In the position shown in full lines of the grippers 7 said grippers are at the end of their down ward stroke and dwell there while the impression is being taken, at the same time the delivery grippers 9 have moved toward the platen but do not finish this motionuntil the form member 40 commences to leave said platen. The delivery grippers then move to the top of the platen and dwell there long enough to seize the printed sheet.

I seems feed grippers dwell long enough to seize a fresh sheet, while the delivery grippers in the meantime have reached their extreme right position and deliver the sheet. The movement of delivery grippers to the right is somewhat faster than the upward stroke of the feed gripper, and the downward stroke of these latter is faster than the leftward movement of the delivery grippers in order that these two gripper mechanisms may be timed correctly to suit the'length of time of the impression.

I claim.

1. The combination of a platen, a shaft, a feeding mechanism adapted to oscillate with said shaft and means for varying the stroke of the said mechanism by changing the location of the said shaft.

2. The combination ofa platen, a feeding mechanism adapted to oscillate around a given center and means for changing the location of said center for varying the stroke of the said feeding mechanism. I

3. The combination of a platen, a feeding mechanism adapted to move around a given center and 'means for operating the said feeding mechanism from one given posit-ion into other varying positions by changing the location of the said given center.

at. The combination of a platen, a gripper mechanism adapted to move around a given center and means for varying the operations ofthe said gripper mechanism by changing the location of the said given center.

5. The combination of a feeding gripper mechanism, arms supporting the same, means for oscillating said arms arounda given center and means for varying the stroke of the said arms by changing their relation to the said center.

- Signed at Hanover Pa. this 2nd day of October 1908;

' ALEX. R. PRIBIL.

position with \Vitnesses:

J. T. KAvnNoUGH, DALE M. STEGNER. 

